What am I looking at?

ONE THING YOU NEED TO KNOW! The lug nuts on the driver's side are probably left-hand thread! It's an odd old Mopar thing. They are left-hand on my '69. Just wanted to let you know before you took an impact to them and broke off some studs :)
As for the gas, I'd probably run no ethanol with a lead additive if that's the original engine, but the guys on here will know much better than me.